CN202451853U

CN202451853U - PTFE (Polytetrafluoroethylene) butterfly valve

Info

Publication number: CN202451853U
Application number: CN2012200846172U
Authority: CN
Inventors: 曹大鸣
Original assignee: TIANJIN BINHAI JINHANG CERAMIC VALVE Co Ltd
Current assignee: TIANJIN BINHAI JINHANG CERAMIC VALVE Co Ltd
Priority date: 2012-03-08
Filing date: 2012-03-08
Publication date: 2012-09-26
Anticipated expiration: 2022-03-08

Abstract

The utility model provides a PTFE (Polytetrafluoroethylene) butterfly valve which has the advantages of simple structure, strong corrosion resistance, reliable sealing performance and no leakage. The PTFE butterfly valve is characterized in that the inner side of a valve seat (10) is provided with concave grooves; both ends of a valve plate (12) are provided with a convex ridge; the concave groove is of a V shape, and a convex groove is of an inverted V shape; the peripheries of an upper valve shaft hole and a lower valve shaft hole at the inner side of the valve seat (10) are provided with the concave grooves, the peripheries of valve shaft holes at both ends of the valve plate (12) are provided with the convex ridges, and the concave grooves correspond to the convex ridges; because the valve seat (10) and the valve plate (12) are made of PTFE, the valve seat (10) and the valve plate (12) can be resistant to corrosion of strong acid and strong base, and the service life of the valve seat (10) and the valve plate (12) is prolonged; and because a sealing structure of the PTFE butterfly valve is subjected to a convex-concave type interference fit, sealing is realized through a press sleeve, so that the sealing performance is guaranteed, axial leakage or seepage of the valve is effectively prevented, and accidents are avoided.

Description

A kind of PTFE butterfly valve

Technical field

The utility model relates to valve technology field, relates in particular to a kind of PTFE butterfly valve.

Background technique

Butterfly valve is widely used in industries such as the petrochemical industry, medicine, metallurgy, chlor-alkali of China; The existing multiple models of the employed control butterfly valve of industry such as present petrochemical industry in China, medicine, metallurgy, chlor-alkali, all the ordinary production to these industries has played certain positive role.And generally be applied in now in the pipelines such as chemical industry, pharmacy, coal gas, liquefied petroleum, mostly the medium that is touched is acid, bases or corrosive gas, and working environment is more abominable, and danger is also bigger.But find in the butterfly valve of employed various models now respectively in various degree existence the component interchangeability of valve poor, maintenance is inconvenient; Or sealing is poor between valve plate and the valve seat, occurs leakage phenomenon easily, and especially its axial seal property is poor, thereby has had a strong impact on the working life of valve.For overcoming all deficiencies that exist in the above-mentioned existing technology, the technician of relevant industries has spent a large amount of painstaking effort, is devoted to develop a kind ofly can overcome above-mentioned defective of the prior art, and satisfies the improvement butterfly valve of multiple industry needs.

Existing strong anticorrosion butterfly valve, the soft rubber interference fit seal is adopted in the axial seal of its valve seat and butterfly valve plate usually, and sealing is general, is not able to bear strong corrosion, and the sealing of the cylinder-packing of employing viton seal ring is also arranged, but fluororubber layer is easy to wear, is prone to come off, and influences sealability.In recent years, although in valve seat and valve plate axial seal, constantly improve, but still can not guarantee that axial seal do not leak fully; Perhaps good sealing effect at that time, but through after a while use, possibly leak again; In case leak; Certainly will cause environmental pollution, device damage, personnel casualty accidents.

Summary of the invention

According to above technical problem, the utility model provide a kind of simple in structure, be able to bear strong corrosion, sealability is reliable, leak free PTFE butterfly valve, mainly comprises key, valve body, attachment screw, major axis, axle sleeve, gland, minor axis, valve seat, valve plate; The butterfly valve seal structure is made up of valve seat, valve plate, valve body; Be provided with the ring-type valve seat in the described valve body, valve plate is installed in the valve seat, and the valve seat ring wall is provided with vertical upper and lower valve shaft hole through the valve body center; It is characterized in that being provided with between said valve plate and the valve seat valve plate valve seat V word seal ring; Peripheral place is provided with concave groove in the inboard upper and lower valve shaft hole of said valve seat, and peripheral place is provided with corresponding convex edge in the valve shaft hole at said valve plate two ends, and concave groove is the V-arrangement shape; Convex edge is the Λ shape, and convex edge and concave groove are interlocked.

On the said valve plate on the height of convex edge and the valve seat degree of depth of concave groove interference fit is arranged, seal through gland.

Described valve body is divided into upper valve body and following valve body two-part.

Described valve seat and valve plate are to adopt teflon to be made.

The beneficial effect of the utility model: described valve seat and valve plate be owing to adopt teflon to make, therefore can anti-strong acid, alkali corrosion, increased working life; Also because the concavo-convex V-shape sealing configuration of said valve seat and valve plate adopts the convex-concave interference fit; Realized sealing through gland; So and then guaranteed its sealability; Make the abundant and metalwork realization isolation of strong corrosive medium, prevented the axial leakage or the seepage of valve so effectively, avoid the generation of accident; The utility model is not only processed easy, is convenient to assembling, and working efficiency is increased; And its structure has simply, economic and practical, can be widely used in fields such as chemical industry, pharmacy, electric power, coal gas, liquefied petroleum.

Description of drawings

Fig. 1 is the structural front view of the utility model;

Fig. 2 is the coupling shaft structural representation of the utility model;

Fig. 3 is the valve plate and the valve seat V-shape sealing configuration sectional view of the utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further:

Like Fig. 1, Fig. 2, shown in Figure 3, a kind of PTFE butterfly valve mainly comprises key 1, upper valve body 2, following valve body 3, attachment screw 4, major axis 5, axle sleeve 6, goes up gland 7, compensation rubber 8, minor axis 9, valve seat 10, following gland 11, valve plate 12, valve plate valve seat V word seal ring 13; Its valve body is divided into upper valve body 2 and following valve body 3 two-part; Be provided with the PTFE valve seat 10 of ring-type in the valve body, the valve plate 12 of butterfly type is installed in its valve seat 10, and valve shaft is formed by connecting major axis 5 and minor axis 9; Its axle head all is equipped with axle sleeve 6; Major axis 5 is respectively equipped with gland 7 and following gland 11 with the jointing place of minor axis 9 and valve plate 12 and valve seat 10, and the said gland of going up compensates rubber 8 with other all being filled with of following gland, has avoided frictional loss; Said valve plate 12 also is provided with a valve plate valve seat V word seal ring 13 with valve seat 10 jointing places; When strong acid and strong base circulated, axially can not revealing of valve so can the corroding metal valve shaft.Valve shaft passes from valve plate 12 and valve seat 10 central vertical then, fixes upper valve body 2 and following valve body 3 with attachment screw 4 again.Said key 1 is arranged on the upper right of major axis 5, is to be used for being provided with connecting assistant tool so that the open and close of valve body.

Claims

1. PTFE butterfly valve; Mainly comprise key (1), valve body, attachment screw (4), major axis (5), axle sleeve (6), minor axis (9), valve seat (10), valve plate (12); The butterfly valve seal structure is made up of valve seat (10), valve plate (12), valve body, is provided with the ring-type valve seat in the described valve body, and valve plate (12) is installed in the valve seat (10); Valve seat (10) ring wall is provided with vertical upper and lower valve shaft hole through the valve body center; It is characterized in that peripheral place, the inboard upper and lower valve shaft hole of said valve seat (10) is provided with concave groove respectively, peripheral place, the valve shaft hole at said valve plate (12) two ends is provided with convex edge respectively, and concave groove is the V-arrangement shape; Concave slot is the Λ shape, and convex edge and concave groove are interlocked.

2. a kind of PTFE butterfly valve according to claim 1 is characterized in that the degree of depth of concave groove on height and the said valve seat of convex edge on the said valve plate has interference fit, seals through gland.

3. a kind of PTFE butterfly valve according to claim 1 is characterized in that said valve body is divided into upper valve body (2) and following valve body (3) two-part.

4. a kind of PTFE butterfly valve according to claim 1 is characterized in that described valve seat (10) and valve plate (12) are to adopt teflon to be made.